/Engine/Source/Editor/SerializedRecorderInterface/Public/Serializers/MovieSceneSectionSerialization.h
Open the serializer for writing
false if the operation was not successful with regards to opening the file, if we have saving turned off it will still return true.
bool OpenForWrite ( const [FString](API\Runtime\Core\Containers\FString) & InFilename, HeaderData & Header, [FText](API\Runtime\Core\Internationalization\FText) & OutFailReason )